What's 0.05 as an improper fraction

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

41/17 as a decimal rounded to the nearest hundredth